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High d33 lead-free piezoelectric ceramics-polymer-salt piezoelectric composite material and preparation method thereof

A piezoelectric composite material, lead-free piezoelectric technology, which can be used in the selection of materials for piezoelectric devices or electrostrictive devices, the manufacture/assembly of piezoelectric/electrostrictive devices, and the selection of device materials. Environmental hazards and other problems, to achieve the effect of simple equipment, simple process conditions, and easy availability of raw materials

Inactive Publication Date: 2011-09-14
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since then, piezoelectric composite materials have become a research focus of piezoelectric materials, but in the past three decades, d 33 Difficult to effectively improve, even with a d as high as 600pC / N 33 The composite material of PZT piezoelectric ceramics and PVDF has been reported in the literature. 33 The highest value is also around 65pC / N
[0003] In addition, lead-containing piezoelectric ceramics and polymers such as PVDF, P(VDF / TrFE) and epoxy resin are usually used at home and abroad to make piezoelectric composite materials. The disposal process will cause great harm to the environment

Method used

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  • High d33 lead-free piezoelectric ceramics-polymer-salt piezoelectric composite material and preparation method thereof
  • High d33 lead-free piezoelectric ceramics-polymer-salt piezoelectric composite material and preparation method thereof
  • High d33 lead-free piezoelectric ceramics-polymer-salt piezoelectric composite material and preparation method thereof

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Effect test

Embodiment 1

[0030] According to the general formula (1-x)(K b Na 1-b )NbO 3 -xLiSbO 3 (x=0.052, b=0.052) stoichiometric ratio of [KNN-LS], prepare KNN-LS lead-free piezoelectric ceramic powder with traditional lead-free piezoelectric ceramic preparation method, KNN-LS (x=0.052, b =0.052) lead-free piezoelectric ceramic powder with PVDF and K 2 CO 3 Mix according to volume percentage 70: 29.5: 0.5 ratio to form composite material powder; Place composite material powder in the tablet press machine and be pressed into the disk that diameter is 13mm, thickness is 1.5mm through the pressure of 18MPa; The disk that obtains is placed in In the muffle furnace, heat treatment at 220 ° C for 6 hours, that is, KNN-LS lead-free piezoelectric ceramics-PVDF-K 2 CO 3 The surface of the obtained piezoelectric composite material is plated or brushed with electrodes using a small ion sputtering instrument or conductive silver paint; then polarized in silicone oil, the polarization conditions are: the...

Embodiment 2

[0035] According to the general formula (1-x)(K b Na 1-b )NbO 3 -xLiSbO 3 (x=0.052, b=0.052) the stoichiometric ratio of [KNN-LS] prepares KNN-LS lead-free piezoelectric ceramic powder with traditional lead-free piezoelectric ceramic preparation method, KNN-LS (x=0.052, b= 0.052) lead-free piezoelectric ceramic powder with PVDF and K 2 CO 3 Mix according to volume percentage 70:29:1 ratio and form composite material powder; The composite material powder is placed in tablet press machine and is pressed into the disk that diameter is 13mm, the thickness is 1.5mm through the pressure of 18MPa; The disk that obtains is placed in In the muffle furnace, heat treatment at 220 ° C for 6 hours, that is, KNN-LS lead-free piezoelectric ceramics-PVDF-K 2 CO 3 The piezoelectric composite material sample; the surface of the obtained sample is plated or brushed with electrodes with a small ion sputtering device or conductive silver paint; then polarized in silicone oil, the polarizatio...

Embodiment 3

[0040] According to the general formula 0.942K 0.48 Na 0.535 NbO 3 -0.058LiNbO 3 The stoichiometric ratio of [KNLN] prepared KNLN lead-free piezoelectric ceramic powder with the traditional lead-free piezoelectric ceramic preparation method, and combined KNLN lead-free piezoelectric ceramic with PVDF and K 2 CO 3 Mix according to volume percentage 70: 29.5: 0.5 ratio to form composite material powder; Place composite material powder in the tablet press machine and be pressed into the disk that diameter is 13mm, thickness is 1.5mm through the pressure of 18MPa; The disk that obtains is placed in In the muffle furnace, heat treatment at 220 ° C for 6 hours, that is, KNN lead-free piezoelectric ceramics-PVDF-K 2 CO 3 Piezoelectric composite material sample; the surface of the obtained sample is plated or brushed with electrodes using a small ion sputtering device or conductive silver paint; then polarized in silicone oil, the polarization conditions are: the polarization tem...

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Abstract

The invention relates to a high d33 leadless piezoelectric ceramics-polymer-salt piezoelectric composite material and a preparation method thereof, belonging to the technical field of piezoelectric composite materials. The preparation method comprises the following steps of: preparing materials are according to proportioned components of (1-x)(LiaNabK1-a-b)(Nb1-cSbc)O3-xABO3-yM by adopting a conventional ceramics production process to prepare KNbO3-NaNbO3 base lead-free piezoelectric ceramics powder; mixing the ceramics powders with polyvinylidene fluoride and salt according to a designed proportion, subsequently cold pressing for molding, heating the mixed powder, sputtering a golden electrode on the surface of the mixed powder, polarizing in a silicon oil bath, and testing the piezoelectric performance d33 of the piezoelectric composite material sample; and finally placing the sample in the air, and testing the piezoelectric performance d33 of the samples. Results show that the d33 of the KNbO3-NaNbO3 base lead-free piezoelectric ceramics-polymer piezoelectric composite materials added with salt is greatly larger than that of the KNbO3-NaNbO3 base lead-free piezoelectric ceramics-polymer piezoelectric composite materials without salt.

Description

technical field [0001] The invention relates to a lead-free piezoelectric ceramic-polymer-salt piezoelectric composite material and a preparation method thereof, in particular to a piezoelectric composite material with high d 33 The invention discloses a piezoelectric composite material of sodium potassium niobate-based lead-free piezoelectric ceramics, polymer polyvinylidene fluoride (PVDF) and salt, and a preparation method thereof, belonging to the technical field of piezoelectric composite materials. Background technique [0002] Piezoelectric ceramics have become the most widely used piezoelectric material because of their excellent piezoelectric properties and can be obtained by traditional sintering methods. However, although piezoelectric ceramics have good piezoelectric properties, they are relatively brittle, which limits their applications. The development direction of piezoelectric materials is to have high piezoelectric properties and certain toughness. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L41/22H01L41/18H10N30/092H10N30/85
Inventor 朱基亮王明松李绪海刘静朱建国肖定全
Owner SICHUAN UNIV